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Spark Plug Leads

Discussion in 'Norton Motorcycles (Modern)' started by pingu-nz, Apr 14, 2019.

  1. pingu-nz

    pingu-nz

    Joined:
    Jun 24, 2011
    Gents

    I have just cut 20mm off the boot of my factory plug leads, The bike has always had a annoying random miss fire while riding, only a split second but noticeable.

    When I changed the plugs I noticed the rubber boot bottomed out before the inner clip was over the plug , which would mean the spark has to jump the gap..
    So 20mm off and now it sits on the plug and no more erratic miss.

    400 km ride over the weekend and no miss fire.
    Worth checking and a simple fix :)

    cheers
    Paul
     
    iwilson, Mark Pashley and Britfan60 like this.
  2. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    One of my spark plugs (left) was barely finger tight and the cap was loose. Man, these things vibe a lot. I know I tightened them up. They ARE long boots on the wires. I use, One 07s. Nice snug fit.
     
  3. iwilson

    iwilson VIP MEMBER

    Joined:
    Nov 6, 2015
    Noticed the same on my rh plug. Took quite a bit of time to wiggle the boot up the lead to make sure the cap was connecting securely to the plug.
     
  4. pingu-nz

    pingu-nz

    Joined:
    Jun 24, 2011
    I tried moving boot up lead ,but ended up cutting off 20 mm ,has certainly made a difference .
     
  5. Accnor73

    Accnor73

    Joined:
    Nov 28, 2018
    Great to know. Another one to Keep an eye on.

    Did I read somewhere that it’s recommended to change the plug leads anyway, one of the first things you should do on the bike? If so, any recommendations?
     
  6. Eljahara

    Eljahara VIP MEMBER

    Joined:
    Jul 8, 2018
    Yes, you read that correctly - Richard7 has some one07 products on the CNW website including the recommended updated leads
    John
    https://www.accessnorton.com/NortonCommando/new-to-961.22618/
     
  7. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
  8. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    Matt Capri formerly of South Bay Norton told me they are EPA and Euro specs compliant wires and they are suppressive crap. Between Matt and Richard....I believe. When I changed the wires and installed the genuine Bosch coil, it was quite a noticeable difference.
     
    richard-7 likes this.
  9. TonyA

    TonyA VIP MEMBER

    Joined:
    Jan 16, 2015
    It is always nice when the manufacturer takes the time to include the Norton 961 into the applications list ! For that reason alone I would be willing to buy them.
     
  10. Fast Eddie

    Fast Eddie VIP MEMBER

    Joined:
    Oct 4, 2013
    I installed them because of the generally accepted opinion that the stock ones are ‘crap’.

    Now, I’m not arguing against that cos I’m not qualified to do so, but, personally, I didn't notice any difference before and after.
     
  11. BritTwit

    BritTwit

    Joined:
    Aug 25, 2009
    Perhaps, due to poor QA/QC, the stock ones can be crap, but more often than not they are OK.
    If you have a misfire or noticeable rough running, then the wires are a likely suspect.
    Mine are stock, and I have not experienced any issues.
     
    richard-7 likes this.
  12. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    The larger 8.5mm one07 wires are designed to work with the better bosch coil. If you only change the coil you’ll notice the stock wires are not up to the task.
     
    Britfan60 likes this.
  13. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    Had to chuckle. EPA and Euro spec compliant, I was told, was because non compliant wires screwed with airwaves and digital signals to our Wi-Fi, phone and TVs. True or false?
     
  14. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    Ive heard non insulting copper cores do like in most older race cars and bikes.
     
    Britfan60 likes this.
  15. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    Where are our priorities, man? A decent picture or clear phone conversation over a great running bike? Absurd? Who are these aliens??:eek:o_O
     
    Fast Eddie likes this.
  16. richard-7

    richard-7

    Joined:
    Feb 24, 2014
    In canada they are trying to gain control of everything we drive to be “green”. Meaning making it really hard to drive and insure classics and modified vehicles. PS. i meant insulating not insulting. Lol.

    Changing the wires and coils from new makes a difference. For some bikes minimal and for some huge. But changing is a must in my opinion.
     
    Britfan60 likes this.
  17. MxMartin

    MxMartin

    Joined:
    Nov 13, 2017
    Yep 'tis true but even my '83 Harley has a warning in the handbook that to use lower resistance wires COULD produce enough interference to screw up it's ignition module as well as mess with neighbourhood tv and radio reception :) , they also specify resistance plugs. Luckily you can still buy a set of 4 champions for £7 free post!
     
    richard-7 likes this.
  18. Britfan60

    Britfan60 VIP MEMBER

    Joined:
    Jan 5, 2014
    I do find the copper core wires to be very polite on my Bonnie. Old school proper British education.
     
    richard-7 likes this.

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